PrusaSlicer¶

Configure PrusaSlicer for optimal use with Mainsail and Klipper.

Thumbnails¶

To display thumbnail previews in Mainsail, you need to configure the G-code flavor and thumbnail settings in PrusaSlicer.

1. Open Printer Settings > General
2. Set G-code flavor to Klipper
3. Set G-code thumbnails to 32x32/PNG, 400x300/PNG

Layer Information¶

To have Slicer based layer information displayed in Mainsail, you have to add some lines of G-Code to the Slicer Printer Settings. Open the Printers Tab (in the topbar) and then Custom G-code set these lines of G-Code:

1. Start G-Code (before your start G-Code):

   SET_PRINT_STATS_INFO TOTAL_LAYER=[total_layer_count]
   

2. End G-Code (at the last line):

   ; total layers count = [total_layer_count]
   

3. After layer change G-Code:

   SET_PRINT_STATS_INFO CURRENT_LAYER={layer_num + 1}
   

Exclude Objects¶

PrusaSlicer 2.7.0 and newer supports native object labeling for Klipper's Exclude Objects feature, eliminating the need for Moonraker preprocessing.

1. Open Printer Settings > General
2. Set G-code flavor to Klipper
3. Open Print Settings > Output options
4. Set Label objects to Firmware-specific

Upload to Printer¶

Upload G-code files directly from PrusaSlicer to your printer using the Physical Printer feature with Moonraker integration.

1. Click the cogs icon next to the printer name

2. Select Add physical printer

   

3. Configure the physical printer settings:

   • Host Type: Klipper (via Moonraker)
   • Hostname, IP or URL: Your Mainsail address, e.g., mainsail.local

   

4. Click Test to verify the connection

5. Click OK to save

After configuration, you can upload G-code directly to your printer using the Send to printer button in the slice dialog or via File > Export > Send a G-Code.